1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * Copyright (C) 2011 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "config.h" 33 34 #include "core/rendering/RenderRubyText.h" 35 36 namespace blink { 37 38 RenderRubyText::RenderRubyText(Element* element) 39 : RenderBlockFlow(element) 40 { 41 } 42 43 RenderRubyText::~RenderRubyText() 44 { 45 } 46 47 bool RenderRubyText::isChildAllowed(RenderObject* child, RenderStyle*) const 48 { 49 return child->isInline(); 50 } 51 52 ETextAlign RenderRubyText::textAlignmentForLine(bool endsWithSoftBreak) const 53 { 54 ETextAlign textAlign = style()->textAlign(); 55 // FIXME: This check is bogus since user can set the initial value. 56 if (textAlign != RenderStyle::initialTextAlign()) 57 return RenderBlockFlow::textAlignmentForLine(endsWithSoftBreak); 58 59 // The default behavior is to allow ruby text to expand if it is shorter than the ruby base. 60 return JUSTIFY; 61 } 62 63 void RenderRubyText::adjustInlineDirectionLineBounds(unsigned expansionOpportunityCount, float& logicalLeft, float& logicalWidth) const 64 { 65 ETextAlign textAlign = style()->textAlign(); 66 // FIXME: This check is bogus since user can set the initial value. 67 if (textAlign != RenderStyle::initialTextAlign()) 68 return RenderBlockFlow::adjustInlineDirectionLineBounds(expansionOpportunityCount, logicalLeft, logicalWidth); 69 70 int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth(); 71 if (maxPreferredLogicalWidth >= logicalWidth) 72 return; 73 74 // Inset the ruby text by half the inter-ideograph expansion amount, but no more than a full-width 75 // ruby character on each side. 76 float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1); 77 if (expansionOpportunityCount) 78 inset = std::min<float>(2 * style()->fontSize(), inset); 79 80 logicalLeft += inset / 2; 81 logicalWidth -= inset; 82 } 83 84 bool RenderRubyText::avoidsFloats() const 85 { 86 return true; 87 } 88 89 } // namespace blink 90
